Glassware forming machine



April 18, 1933.

.1. E. MGLAUGHLIN GLASSWARE FORMING MACHINE l Filed Nov.. 3. 1928 5Sheets-Sheet' 1 sa Qa April 18, 1933. .1.- E. MGLAUGHLIN 1,904,982

` GLAsswARE FORMING MACHINE y Filed Nov. 5, 1928 3 sheets-sheet 2' April18, 1933. J. E. MCLAUGHLIN 1,904,982

GLASSWARE FORMING MACHINE Filed Nov. 3, 1928 3 Sheets-Sheet 3 TIE-5-,4.5

V710/IIA my i lation between the cams contro Patented api.l i8, i933 vJOHN n. Henneman, or TOLEDO, onrdsssmiron To owns-rumors omas conm, orfroLEno, omo, a' consumimos oromo The present invention relates toimprovements in machines for forming hollow glassware. More particularlythe invention relates to improved means for actuating the holding 5means by which bottles or the like articles bottom plate of thefinishing mold in pre# venting premature lateral or other movement -l ofthe articles. Without this knock-out or holding arm bottles or similararticles frequently stick to one of the mold sections and Aare movedthereby in such a fashion that they are not pro rly dischar from themachine, the resu t being that t e articles become broken or sodistorted that they cannot be used. This holding arm revents suchmovement of the articles andw en accurately adj usted insures dischargeof the articles from 23 the forming machine at the roper point.

These holding arms whic are individual to the finishing molds areperiodicallyl swung in an arc to bring disks carried by t e arms topositions over the u per end of articles in the inishin mold. ediatelyfollowing such (positioning of the disks the latter are move ticle.Ordinarily the swinging movement of the arm is obtained thru engagementbetween a stationary cam and portions of thel carrier for the holdingarm. Because of necessarilv limited amount of space allotted n to thiscamit has been .necessar to shape the icam to quickly move the knoc-outarms to 4 and from their operative positions: The increased speed atwhich machines are at present, operated has proportionately increased' fthe speed of operation of the holding arms with the result thatthelatter are su jected to quite severe strains and wear.

Another objection to such operation of the 't bottle'holding arm,resides inA the dilicultyv often "experienced in Vinaintaiiiiiiltpropierreg t e 5 sition .of the arm over the bottles or er l theserpentine'track and always axially into contact with the ar-GLASSW-.ARE FORHING IACHINE Application med November 3, 1928. Serial Io.818,885.

articles, and the serpentine track which alteriiately7 raises and lowersthe nisliing mold units. u t nless these cams are quiteaccuratepositioned with respect to each other and maintained lili4 insuch positions, the holding disks which seat upon the bottlesor similararticles in the finishing molds are subject to vibration or lat-` eralmovement of a degree to distort or` scratch the linish or sealin vendsolf--the'bottles. 1 Such glassware is unt for comercial use.

An object of the present invention is to avoid the above objections byproviding novel 'means to position the disks over the articles in thefinishing mold, said means being capable of efficiently performing itsfunction ir respective of its relation to( the serpentine track whichraises and lowers the finishing 7 v 0 molds.

Another object is to provide improved `means for oscillating the holdingarm, saidv ineens embodying a safety device insuring inoperativepositionin of the .arm under abnormal o rating con itions. v l

A flirt er object is to provide novel and easily adjustable means tocontrol the degree of oscillato movement of the knock-out arm .to therey insure accurate itioning of the holdin disks over the articles in the9 finishing mol y Other objects will be apparent hereinafter. In thedrawings: Fig. 1 is a fragmentary plan view. of the invention shown inconjunction with a finishing mold head. Fig. 2 is a side elevationthereof with parts in section. Fig. 2A isan elevation showing the disklowering cam and means to adjust the latter. Fig. 2B is a sectional viewof the cam adjusting means taken along the' line IIB-IIB ofFig.2A. l I

Fig. 3 is a detail fragmentary elevation 95 with parts insection showingthe meansfor actuating the holding arm. i Fig. 4 is a fragmentary sideelevation looking at therighthand side of Fig.- 3. i y

` Fig. 5 is a sectional view'taken' alongthe( 100 ingjnhe holding arm.

Fig. 6 is a plan view of the valve mechanism for controlling the airunder pressure. Fig. 7 is a sectionalview taken along-the 1in@ vir-vn.of Fig. 6,

Fig. 8 is a fragmentary elevation ofthe side shown in Fig. 3, the coverplate being removed to disclose the rack and pinion mechanism whichoscillates the knock-out arm.

Fig. 9 is a fragmentary sectional view of a portion of the means forraising and lowerig. 10 is a' sectional view taken along the iine X--Xof Fig. 9.

Fig. 11 is a fragmentary elevation showing the adjustablemeans by whichthe extent o oscillation of the holding arms may be predetermined.

In the drawingsillustrating the preferred embodiment of the inventionthe latter is shown associated with a bottle blowing machine including afinishing mold 15 mounted on and for rotation with arotary frame 16, andadapted for vertical swinging movement on trunnions 17 at regular timeintervals to alternately position the mold to receive a blank to beexpanded and then discharged asa finished article. A serpentine track 14is provided to control the successively changing positions yof thefinishing mold. The mold supporting means and operating mecha- Lnisinmay be of any approved or conventional type.-

The article holder or knock-out arm 18 is sup orted on the 'upper end ofa rock shaft 19 wardly thru a carrier 20 which is formed at yeo theouterend of a sup orting arm 21.v This arm may be curved suiistantlallythruout its length and is provided with an attaching flange 22 securedby bolts 23 to the finishing mold frame 24. Ipassageway 25 extends lenhwise of the curvedarm 21 thereby providlng a conduit for air, which, aswill be vhereinafter apparent, is directed thru the holding or knock-outdisks to the interior of articles such as bottles .B in the finishingmold 15. v The carrier 20 (Fig. 3) includes an elongated tubular housin26 the upper portion of which provides a earin for a sleeve 27 whichencloses an interme iate portion of the sha-ft 19 and may be secured tothe latter by a pin 28 or some similar fastener. This sleeve is for thegreater part spaced from the shaft (Fig. 3) to provide a chamber inwhich a coil expansion spring 61, hereinafter described, is placed. Thelower portion of the sleeve 27 is formed with a circumferential seriesof gearteeth 29 running in mesh with a rack bar 30. This rack baris-reciprocated at regular time intervals by mechanism hereinafterdescribed, to impart an oscillatory register f tends igs. 1 and 2) thelatter extending downdisks 34. vThe other en'd of the axial openf ing 31in the rock shaft 19 communicates thru a series of radial ports 35 withan arcuate recess36'formed inthe exterior face of the sleeve 27. Thisrecess 36 is at all times in l with a port 37 in the housing 26 leadingdirectly to the conduit 25 which exengthwise of the curved supportingarm 21 (y igs. 1 and 4). Thus air which-is directed into the passageway25 or chamber inthe supportin arm 21, by a means hereinafter describemay be conducted to thev outlet orifices 33 in the holding'disks 34 fora plication internally of articlesin the tinis ing molds 15. Theknockout disks 34, or

article holding devices,may be supported 'at the outer end of theholding arm 18 in any approved fashion, well known manner discharge ofthe articles from the` corres onding igs. 3 and 4) connecting theholding arm to the rock shaft may be adjusted lengthwise of said shaft19 to meet varying operating conditions, such for example, as a changein to controlv and time the y the height of bottles being produced.

The rack bar 30 (Figs. 3, 4 and9) hereto- .fore referred to ascomprising part of the sa' f and may be adjustable in a l finishingmold. lsothe block-38 l mechanism employed to'v oscillate the rock oshaft 19 is arranged in a slideway 39 in one ing a considerable distanceto one side 4of the tubular housing 26 and above a piston motor to'bedescribed. Thegraek bar 30 is provided with an additional seriesvofgearv teeth 40 arranged at right anglesvto teeth which run in meshwith the teeth`29 Aorpinion at the lower end ofthe sleeve 27.r "f Thisadditional series of teeth 40 runsin` mesh with a pinion 41 arrangedabove said rack bar 30 and journaled on a shaft 42 whosev ends aremounted in bearings 43 (Fig. '4)'.` One of these bearings 43 sformed ina cover platey 44 removablyY attached to the carrier 20 and servingto-retain the gear and rack bar in operative relation to each other andaii'ord protection to the parts therebeneath.

' A piston motor'45arranged below the rack bar' 30 and pinion 41provides means to oscillate'the pinion 41 at regulartin'lel intervals.This -iston motor 45 includes a cylinder 46 exten ing parallel with therock shaft 19 and enclosing a piston 47 ,the latter having a boss facelof the carrier 20, said slideway extend- 48 formed on'its upperv face.A rack bar L l 49 is connected to. the boss 48 and extends upwardly-thrua slideway 50 (Figs. 5 and'8) inthe carrier 2O and along side of thepinion 1an-masa 41, the teeth of said rack bar running in mesh j tiveposition at one side of the mol such as bottles B in the parent.

rock shaft 19. and holdin with the pinion. A coil sprm said boss 48 anda portion of t e rack bar 49, operates to normally yieldingly hold thepiston 47 inits lowermost position so that the holding arm 18 and holdlndisks 34 carried by the latter will norma y befinoperatively positioned.This coil spring 51 also functions vas a safety device, in that it atall times exerts a downward rassure on the iston 47 and as a result tenliolding arm 18 in its outermost or ino llag- 4The extent of upwardmovement of the rack bar 49 is controllable by a stop with which theupper end of the'rack bar con'- tacts when the latter reaches the up`rmost limit of its stroke. This stop ig. 3) comprises a set screw 52and a lock nut 52, the latter operating to hold the set screw or stopAin an adjusted position. vProvision of this stop acilitatesad'justmentto obtain accurate positioning of the holding disks upon the articles inthe molds, as will be ap- The 10wer end of are cylinder 46 fV aie pistonmotor 45 is closed by a removable head y53, the latter ready access tothe interiorof the cylinder.-` An air inlet port 54 extends thru oneside providingmeans permitting of the cylinder 45 near its lower end andleads to a chamber 55 to which air under pressure is supplied thru apipe 80 from'a tank (not inflow of air under pressure to the motorcylinder 46.` The foregoing structure pro.

vides means for moving the knock-out arm out disks 34 into with the openupper ends of articles in the finishing molds 15 at regular timeintervals.

Mechanism to be now described, includes means for imparting axialmovement to the arm 18 whereby the disks 34 are alternate ymovedi'ntof,and out of contact with 'the upper ends of articles molds. Athrust bearing 60 is arranged at the 4lower end of the rock shaft 19 andsupports the lower end of a coil expansion spring 61 which for thegreater partis positioned within the sleeve 27.' Thisspringencirclesithe rock shaft 19 and exerts an upward pressure on the sleeve27 and shaft 19 so that the latter and the holding disks 34 are normallyyieldingly held in their uppermost positions in a plane above the upperends 'of the bottles B. The

lower end ofthe rock shaft 19 carries anl 51 encircling` to retain the'1 adapted to'move the roc shown). A needle valveV 56 regulates the'latter functioning as stops limiting theswinging movement of said stopfinger 64. f

One end `wall of thearcuate slot or recess ing screw 69. By moving saidother block vertically after tnelock nut 68 hasbeen released, the firstnamed wedge block is ad- {usted in a directionytransversely of its engthto change` the length of the arcuate path thru which the stop finger 64moves. Thus, oscillatory movement of the knock-out arm 32 maybe furthercontrolled to thereby provide additional insurance against impropercontact between the disks and arti cles in the finishing molds. A lockscrew 57 v (Fig. 9) prevents accidental displacement of the stopfinger.A cover plate 59 or guard glaced over the slot 6'6.

vend of the housing 26 is formed' with an arcuate slot extendingcircumferentially of the sleeve'. The pin 65 which carries'the stopfinger 64' projects thru this slot. Suchy construction allowscircumferential 4movement of the stop finger 64 and pin 65 independentlyof the sleeve 63 so that the cam roll 72 will at all times be positionedfor engagement with the cam 73-as will lbe a parent the latter shaft 19in the direction of its length. formed with a de nding fi a cam rcll 72igs. 2 an adapted forengagement at regular time in'- tervals with thestationary cam 73. A key er 71 carrying 63 about t e extension-62. Thecam 73is he short sleeve 63l (Fig. 9) in the lower This sleeve 63 is 9)the-latter so positioned with respect to the discharge w station and thepoint at which the disks are brought in register with the upper ends ofbottles B in the finishing molds, that the rock shaft ,19, as abovestated, is moved axially by said cam to cause tween the disks 34 andbottles just prior to openin of the finishing molds 15.

Supp y of air under pressure to the piston motor V45 and holding disks34 is regulated and controlled by a valve mechanism actuated by casing75 or housing (Figs. 1, 2and 7) which is mounted upon and rotates withthe mold carria e16.

Wit in the valve casing (Fig. 7) and at one side thereof is a pair ofvertically spaced valves 77 and 77n carried by an upwardly4projectingsteni 83*,the latter extending thru a guide opening i'ntheupper wall of the casmg 75. A. coil spring 78 exerts an u wardpressure upon the lower valve 77 ten ing to move the latter to close theupper side of the g chamber 76". The upper valve 77, when seats ed asshown in Fi lcloses thelower side engagement bev no h stationary camsand including a valve l and at other times allows the spring 78 toexpandand thereby unseat said upper valve 77 and seat or close the lowervalve 7 7 The lower chamber 76n (F ig. 7) is connected to a supply pipe79 leading from any suitable souroe' of supply tor air under pressure,such air being constantly supplied to the lower chamber 7 6s.- A exiblepipe 80 (Figs. 6, 2 and 4 leads from a point between the valves 7 7 and7 a to the lower endet the motor cylinder 46. A bleed opening 81 isformed in the wall of the upper chamber 7 6 and is connected to apet-cock 81 (Fig. 6).

When a'mold group approaches the discharge station (not shown the cam 85causes rocking of the bell-crank lever 82 thereby swinging the outer endof the latter downwardly and thereby opening the lower valve 77a. andclosing the upper valve 7 7 While the valves are so relativelypositioned, air under pressure flows from they chamber 76n thru the:flexible pipe 80 to the lowerend of the piston motor cylinder. rlhepiston 47 is raised by the air under pressure and thru the series ofrack bars and pinions (Figs. 3 and 5)` heretofore described swings theholding arm 18 from its normalA position at one. side of the mold 15, toa position over the mold to thereby bring the holding disks 34 intovregister with the bottles B. After the disks 'have been seated upon thebottles and then unseated, in a fashion to be described presently, thebell-crank lever 82 is rocked to allow upward movement of the valves 77and 77 under "influence of the coil spring 78. 1This valve. movementseats the lower valve 77E shutting ed' supply of air under pressure @tothe pipe 89 and providing communication be' tween the pipe 80 and theupper chamber 76 which leads to the bleed opening 81. With the valves inthe positions just stated, the air below the piston 47 (Fig. 3) isexhausted thru the pipe 80 and bleed opening 81; Expansion if of thecoil spring 51 (Figf3) within the motor cylinder 46 increases the-rateof exhaust of air from the cylinder 46`and actuates the rack barsI andpinions in a fashion to swing the holding arm -18 to its originalposition -at one side of the corresponding finishing' mold 15.

The valve casing (Fig. 7 also includes a pair of .vertically ,spacedchambers 86 and l l 86 separated from the chambers 76 and '76L abovereferred to by a partition 7 5a. A valve 98 is arranged within the lowerchamber 86* and carries a stem 93 extending upwardly thru thecasing 7 5and contacting with a lever suite le source o l Leonesa 95 pivoted tothe hinge pinl 83 and carrying a cam roll 96 which rides upon astationary ycani 97 A coil spring 94 arranged in the lower chamber 86aexerts upward pressure upon the valve 90 and tends to hold said valveupon ther seat 92 to thereby prevent communication between the upperand' lower chambers 86 and 86": The lower chamber 86B is provided withan inlet opening 87 communicatin with a sup ly .pipe 88 eading to anypair, pressure suppl (not shown). The upper chamber 86 1s ormed with anoutlet opening 91 communicating with a exible pipe 89 (Figs. 6, l and2). This pipe 89 leads to the chamber 25 (Fig.

4) which in turn communicates by way of'.`

ports 35 leading to an axial opening 31 in the rock shaft 19 withaxialopenings 33 in the holding disks 34. This opening 31' in turn leads to apassageway 32 extending lengthwise of the holdin arm 18.

After, or simultaneous y with, seating of the holding disks 3l upon thebottles B as above described, the rock arm 95 is'moved/ downwardly bythecam 97 to unseat the valve and thereby establish communication' betweenthe lower chamber 86'* and the upper chamber 86. Air under pressure maythen ilow into the upper chamber86 and thence thru the `flexible pipe 89and passageways which lead from said pipe to the axial openings 33 inthe holding disks 34. This air isl thenV directed into thebottl,es 9B ito chill and thereby set the glass. Upward swinging movementof the rockarm allows the coil spring 94 to expand and thereby seat the valve 90and shut oil low of air under pressure into the upper chamber 86. Afterthe disks are lifted away from the bottles the air 4under pressurewithin the pipe and passageways between the disk and chamber `86 isexhausted thru the ports 33 in the disks.

'lhe operationl may be briey reviewed as follows: The linishing molds15, which are ordinarily arranged in an annular series ro- I tatingabout a vertical axis, are brought one at a time to a discharge station,in` advance .of which the molds are opened, so that artilcles-oiglassware, such as bottles B may `be ejected from 'the molds 15 at saidVstation.

A short/distance in advance of the'discharge 'l station, the cam 85(Figs. 6 and 7,) rocks the l'lever 82 to openy the valve 77 so that airunder pressure is applied to 4 the lower side of the piston 47 of theair motor e5. Thus, the piston is moved upwardly and thru the rack barsand pinion referred to swings theA knockout arm 18 laterally, bringingthe holding disks 34 to .position over and in proximity to the upperends or the bottles l in the mold 15. Immediately following suchpositioning ot the .disks 34 the cam 73 moves the rock shaft 19 axiallydownward thereby snugly seating' the holdingdisks upon the upper ends ofthe bottles. The out- 1.90am j t es or at a later period if desired, thecam.

97 (Fi s. 2 and 7) rocks the lever 95 to open the valgve 90, so that airwill low into the' conduit .89 and thence into and thru the passageway25 from which the air enters t `e axial openin 31 in the rock shaft 19and flows upwar 1y and outwardly thru the conduit 32 to the outletorifices 33 insaid holding disks. Thus, air is applied internally-ofthearticles in the molds and o erates to set the glass comprising theartlcles to a certain degree rior to their discharge from the molds. ecam 73 (Figs. 2 and 2A) located adjacent the serpentine track 14, is soshapled that itallows the spring 61` to raise the olding arm 18 andthereby remove the disks 34 from' contact with the bottles B after vthefinishing molds 15 have opened so that. the bottles may be, dischargedfrom the molds at the proper point or points. The cam 85 (Figs, 2 and 7)operates, after discharge of the bottles, to shut oii' the supply of airunder pressure to the lower end of the iston motor cylinder 46 and somoves the va ves 77 that the conduit 80 is opened thru the upper end ofthe chamber 76 tothe atmosphere. 'I'his allows'exhaust of air from thelower end of the motor cylinder/46 to the atmosphere. The e ansion coils ring .51 is now free to move .t e piston 47 ownwardly, and does so,with theresult that the rack bars and pinions heretofore ldescribed areactuated to return the holding arm 18 to its normal position at one sideof the correspondin finishing mold 15.` From' the above itis evldentthat it is unnecessa to swing the holding arm 18 from one position toanother at an excessive rate as by the cam heretofore em loyed, theresult bein that very little str am and wear are im os upon the movinparts of the article ho ding mechanism. T is is` in direct contrast toconditions existing where the rate of movement of the arm is excessive,because of the necessarily short quick acting cam employed to oscillatesaid arm. v v In the event of the holding disks 34 seating off centervupon the' bottles so that they do not properly hold the bottles, or donot allow injection of air into the latter, the stop screw 52 may beadjusted to change the length of the stroke of the rack bar 49 andpiston 47, or the wedge blocks 67 (Figs. 10 and 11) may be ad'u'sted toincrease or decrease the extent of t e swinging movement of the arm 18tothe degree necessary to obtain proper seating of the disks. Bothadjustments may of course be made if found desirable.

When the cam roll 72 (Fig. 2) passes beyond the cam 73 (Figs. 2A and 2B)the rock shaft 19 is lifted by the coil spring 61 thereby rai theholding disks 34vaway from the bottles. l he bottles immediatelyv fallby gravity into a chute (not shown) for delivery to any approved type ofware handling mechanism (not shown). Varying conditions may `requirechanges of greater or less degree in the exact point of discharge of thearticles. This is obtained by vslidingly supportin the cam 73 on astationary bracket 100 igs. 2A and 2B). A cam carrier 101 is inter sedbetween the cam 73 and bracket 100 an is provided withrack teeth 102 onits inner face running in mesh with a pinion 103. This pinion is securedto the upper end of a shaft 104 carrying a worm ear 105 which mesheswith a. worm .106. he worm and, gear are enclosed in a housing 107suspended rom the stationary bracket 100 heretofore referred to. Anoperating rod l108 has one end connected to the worm 106 and as shownmay be composed of sections secured together by universal joints, forobvious reasons. lA hand wheel 109 is rovided to rotationof the rowhereby t e cam 73 ma be moved in the direction of its len h. Sucmovement of the cam changes t e ointat which the cam roll 72 moves beyonthe ini rmit manual.

iiuence of said cam and vas a Aresult correspondingl'y varies the pointat which theA holding disks 34'move upwardly away from the bottles topermit discharge of the latter I from the molds 15. v

Modifications may be resorted to within the spirit and scope of theappended claims. ,WhatIclaimisz l l g y 1. `The combination with afinishing mold,

of a holding arm to engage an article in the mold and hold it duringopening of the mold, j; l

a carrier on which sald arm is mounted, a

rock shaft providing connection between the arm and carrier,usa1d shaftbeing capable off axialrand oscillative movement in the carl,

' rier, a piston motor, means including a series of rack bars and pmionsoperated and controlled b said motor to oscillate the shaft and there yposition the arm over said article and at one side thereof inalternation, and cam rmechanism operable independently of said motor,rack bars and inions to impart axial movementto the sha and'thereby pegriodically cause en agement between the arm A and the article in t emold.

2. Thecombination with a finishing mold, y'

of a holding arm to engage an article -in the mold and hold it duringlopening of the mold,

im `a carrier on which" sald arm 1s mounted, a

rock shaft providing connection between the -arm and carrier, said shaftbeing capable of axial and oscillative movement in the carrier, a pistonmotor, ,means operated and controlled by said motor to oscillate theshaft and thereby position the arm yover said article and at onesidethereof in alternation, cam

mechanism to impart axial movement to the g shaft andtherebyperiodically cause engagement between the arm and the article inthe l mold, said cam mechanism operable independently of said motor andthe said means operated thereby, andl means to apply air in- 5 ternallyof the article while said arm is povsitioned over the latter.

3u The combination with a iinishing mold, of a holding device to engagean article in the mold and hold it during opening of the mold, a pistonmotor, kmeans including rack and inion mechanism operated and controlledy said motor to move the holding device laterally to the position overthe article, Cam actuated means operable independently of said motormechanism, for moving the holding device downwardly into engagement withsaid article, and adjustable means to control the extent oi movementcaused by operation of the motor to thereby predetermine 'the operativeposition l02?' the holding device rela.- tive to the article in themold.

Ll. 'The combination with a finishing mold, of a holding device toengage an article in the mold and hold it during opening of the mold, apiston motor, a rack bar constituting a piston rod for lsaid motor,means operated and controlled by movement of the rack bar to move theholding device laterally to a position over the article, and means indeendent ci the piston motor to move therhol ing'device into enga ementwith said article. t V 5. The com ination with a finishing mold, ciaholding device to engage an article in the mold and hold it duringopening ot the-mold, apistonmotor, a rack'bar constituting a piston rodfor said motor, means operated andv controlled by\movement of the rackbar tov move the holding device laterally to a position over thearticle, and cam mechanism operable independently of the-motor to movethe holding device into engagement with said article.`

` 6. The combination with' a nishing mold, of a' 'holding device toengage an article in the mold and hold it during openingo the mold, apiston motor, a rack har constituting l a piston rod for said motor,means operated and controlled by movement of the rack bar the pistonmotor to move the holding device into engagement with said article, andan ad.- linstable stop controlling the extent of movement of the racklbar and thereby-predeterminingthe final operative position `o theholding device with respect to the article in the mold. y 7 Thecombination Witha finishing mold,

ton rod` for said motor, means operated and controlled by movement ofthe rack bar to move the holding device laterally to a. posii tion overthe article, means independent of to move the holdingdevice laterally toa posii tion over the article, means independent of of a holding deviceto engage an article in the Leonesa the piston motor to move the holdingdevice A andcontrolled by movement of the rack har.

to move the holdin device laterally to a position 'over the artic e,means independent of .the piston motor to move the holding device intoengagement with said article, and yielding means included in the pistonmotor normally tending 'to position the holding device at one side ofsaid mold, said last named means includin a coil expansion ,springencircling saidrac bar within the piston motor.

9. The combination with a iinishing mold,

oi a holding device to engage an article in the mold and hold itdnringvopening of the mold,

means including a series of racks and pinions to move the holding devicelaterally to a position over said article, and means independent oi theracks and pinions for moving the holding device downwardly intoengagement with said article.

l0. The combination with a finishing mold andy means for moving saidmold in a closed path, of a holding device mounted for movement in aclosed path with the mold, sa1d holding device adapted to engage anarticle in the-mold and hold it during opening of the mold, a piston`motor, means operated and controlled by said motor to move the holdingdevice laterally to a position over the art1cle, cam actuated means tomove the holding device downwardly into engagement with the article, acam brought by movement oi the mold into engagement with said means formoving the holding device downwardly into contact with'the article, andmeans for ad- Ijusting the cam to vary the' point of initial contact ofthe holding device with said article. Y i

11. The combination with a nishing mold and means for moving the mold inYa closed path, of a holding device mounted ier movef ment in a closedpath, an arm supporting said A holding device, a rock .shaft extendingalong- I side and lengthwise oi the mold and connected at its `upper endto said arm, a carrier in which the rock shaft is mounted foroscillation and reciprocation, means for oscillating and reciprocatingsaid rock shaft and arm to thereby periodicallyplace said deviceincontact with an article in the inishingmold, said carrier having aslot extending lengthwise in one wall, a radialiing'er carried by the yrock shaft and extending into said slot, and

means for changin the spaced relation between opposed longitudinal wallsof the slot neoa'eea to thereby vary the degree o oscillatory movementoie the shaft.

12. The combination with a finishing mold and means for moving the moldin a closed path, of 'a holding device mounted for movement in a closedpath, an arm supporting said holding device, a rock shaft extendingalongside and lengthwise of the mold and connected at its upper end tosaid arm, a carrier in which the rock shaft is mounted for oscilationand reoiprocation,means for oscillatlng and reciprocating said rockshaft and arm to thereby periodically place said device in contact withan article in the finishing mold,

said carrier having a slot extending length- Wise in one Wall, a. radialfinger carried by the rock shaft and Aextending into said slot, one

longitudinal wall of the slot comprising a pair of tapered blocks, andmeans for adjusting the blocks relative to each other to thereby changethe Width of the slot and correspondingly vary the degree of oscillatorymovement of therock'shaft.' n

Si ed at Toledo, Ohio, this 31st day of a3 Octo r1928.

JOHN E. McLAUGHLIN

